Carrier WeatherExpert 48N2 Controls, Start-Up, Operation, Service, And Troubleshooting page 122

ALARM OR
ALERT
NUMBER
T093
Circ B Suction Press Transducer Failure
T094 Circ A EXV 1 Thermistor Failure
T095
Circ A EXV 2 Thermistor Failure
T096 Circ B EXV 1 Thermistor Failure
T097 Circ B EXV 2 Thermistor Failure
T098 Circuit A Liquid Temperature Thermistor Failure
T099 Circuit B Liquid Temperature Thermistor Failure
T100 Circ A Liquid Press Transducer Failure
T101 Circ B Liquid Press Transducer Failure
T110 Circuit A Loss of Charge
T111 Circuit B Loss of Charge
T112 Low Circuit A Charge Detected
T113 Low Circuit B Charge Detected
T114 High Circuit A Charge Detected
T115 High Circuit B Charge Detected
P120 Circuit A Low Saturated Suction Temp, Comp Shutdown
T120 Circuit A Low Saturated Suction Temperature Alert
A120 Circuit A Low Saturated Suction Temperature Alarm
P121 Circuit B Low Saturated Suction Temp, Comp Shutdown
T121 Circuit B Low Saturated Suction Temperature Alert
A121 Circuit B Low Saturated Suction Temperature Alarm
T122
Circuit A High Saturated Suction Temperature
T123 Circuit B High Saturated Suction Temperature
P126
Circuit A High Head Pressure, Comp Shutdown
T126 Circuit A High Head Pressure Alert
A126
Circuit A High Head Pressure Alarm
P127 Circuit B High Head Pressure, Comp Shutdown
T127
Circuit B High Head Pressure Alert
A127 Circuit B High Head Pressure Alarm
T128
Digital Scroll A1 High Discharge Temperature Alert
A128 Digital Scroll A1 High Discharge Temperature Alarm
A140 Reverse Rotation Detected
A150 Unit is in Emergency Stop
A152 Unit Down due to Failure
T153 Real Time Clock Hardware Failure
A154 Serial EEPROM Hardware Failure
T155 Serial EEPROM Storage Failure Error
A156 Critical Serial EEPROM Storage Fail Error
A157 A/D Hardware Failure
A169 EXV Board Communication Failure
T170 Loss of Communication with the Compressor Expansion Module
A171 Staged Gas Control Board Comm Failure
T172 Control Expansion Module Comm Failure
A173 RXB board Communication Failure
A174 EXB board Communication Failure
A175 VFD1 Communication Failure
T176 VFD2 Communication Failure
T177 4-20 mA Demand Limit Failure
T178
4-20 mA Static Pressure Reset Fail
A179 Cir. A EXV Board Communication Failure
A180
Cir. B EXV Board Communication Failure
T181 Loss of Communication with Outside Air Limit
A200
Linkage Timeout Error - Comm Failure
T210 Building Pressure Transducer Failure
T211
Static Pressure Transducer Failure
T220 Indoor Air Quality Sensor Failure
T221
Outdoor Air Quality Sensor Failure
T229 Economizer Min Pos Override Input Failure
T245 Outside Air CFM Sensor Failure
T246 Supply Air CFM Sensor Failure
T247 Return Air CFM Sensor Failure
T248 Exhaust Air CFM Sensor Failure
T300 Space Temperature Below Limit
T301 Space Temperature Above Limit
T302 Supply Temperature Below Limit
T303 Supply Temperature Above Limit
T304 Return Temperature Below Limit
T305 Return Temperature Above Limit
Table 92 — Alert and Alarm Codes (cont)
DESCRIPTION ACTION TAKEN BY CONTROL
Circuit shut down
Circuit shut down
Circuit shut down
Circuit shut down
Circuit shut down
Alert Only - no circuit prognostics
Alert Only - no circuit prognostics
Alert Only - no circuit prognostics
Alert Only - no circuit prognostics
Circuit locked off
Circuit locked off
Alert Only
Alert Only
Alert Only
Alert Only
Circuit staged down
Circuit shut down
Circuit locked off
Circuit staged down
Circuit shut down
Circuit locked off
Alert Only
Alert Only
Circuit stage down
Circuit shut down
Circuit locked off
Circuit stage down
Circuit shut down
Circuit locked off
Digital compressor A1 shutdown
Digital compressor A1 locked off
Stop unit
Unit shut down
No mechanical cooling available
Unit shut down
Unit shut down
Alert only
Unit shut down
Unit shut down
Humidimizer control disabled
Compressors A3, A4, B3 and B4 disabled
Staged gas control disabled
All CEM board functions disabled
Unit shut down
All EXB board functions disabled
Unit shut down
No building pressure control
No demand limiting
No static pressure reset
Circuit shut down
Circuit shut down
Alert only
Resorts to local unit set points
No building pressure control function
No static pressure control
No IAQ control
OAQ defaults to 400 ppm
Operate without override
No OA CFM control
Unit shut down
Unit shut down
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
122
RESET METHOD
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Manual
Automatic
Automatic
Manual
Manual
Manual
Automatic
Automatic
Manual
Automatic
Automatic
Manual
Automatic
Manual
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic